Degassing cascades in a shear-thinning viscoelastic fluid

Details Degassing cascades in a shear-thinning viscoelastic fluid Degassing cascades in a shear-thinning viscoelastic fluid

2011-07-28

arxiv.org/abs/1107.5711v1

Physics

Fluid Dynamics

Scientific paper

We report the experimental study of the degassing dynamics through a thin layer of shear-thinning viscoelastic fluid (CTAB/NaSal solution), when a constant air flow is imposed at its bottom. Over a large range of parameters, the air is periodically released through series of successive bubbles, hereafter named {\it cascades}. Each cascade is followed by a continuous degassing, lasting for several seconds, corresponding to an open channel crossing the fluid layer. The periodicity between two cascades does not depend on the injected flow-rate. Inside one cascade, the properties of the overpressure signal associated with the successive bubbles vary continuously. The pressure threshold above which the fluid starts flowing, fluid deformation and pressure drop due to degassing through the thin fluid layer can be simply described by a Maxwell model. We point out that monitoring the evolution inside the cascades provides a direct access to the characteristic relaxation time associated with the fluid rheology.

Affiliated with

Also associated with

No associations

Rating

Degassing cascades in a shear-thinning viscoelastic fluid does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Degassing cascades in a shear-thinning viscoelastic fluid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Degassing cascades in a shear-thinning viscoelastic fluid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-414218